From Food & Wine Magazine March 2010 - This is super yummy, but much too spicy as written for our taste. I reduce the Chipotle to 3/4 t. We also like the fish more as is, with the avocado and mayo lime sauce without the cabbage and tortillas.
Preheat oven to 350°F In a small bowl, whisk the mayo with the lime juice. In another small bowl, combine the chipotle powder with the orange zest and sugar. Rub each salmon piece with 1 t. olive oil and then the chipotle-orange zest mixture. Let sit 5 minutes.
Wrap the tortillas in foil and bake for about 8 minutes, until they are soft and heated through.
Meanwhile, heat a grill pan. Season the salmon with salt and grill over high heat, until nicely browned and just cooked through, about 3 minutes per side.
Gently break each salmon piece in half. Spread the mashed avocado on the warm tortillas, top with the salmon, and the cabbage. Drizzle each taco with the lime-mayo and serve right away.